qantum theory of matter - WaveParticle Duality of Matter...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Wave-Particle Duality of Matter Wave-like Behavior of Matter In 1925, Louis DeBroglie hypothesized that if light, which everyone thought for so long was a wave, is a particle,  then perhaps particles like the electron, proton, and neutron might have wave-like behaviors. He went further  and reasoned that since waves are described by their wavelength λ and particles are described by their momentum,  p then we can relate these two variables by recalling that the Quantum Theory says E = h   = hc/ , ν λ and the theory of Relativity says E = m c 2  = p c. Then let's equate these two equations to get the DeBroglie relationship between  momentum  (a particle  property) and  wavelength  (a wave property) p = h/ λ The first real experimental proof of this relationship came from Davisson and Germer in 1925, who found that  electrons will diffract and interfere like waves, just like X-ray photons (light). For example, an electron with a  velocity of 5.97 X 10 6  m/s (mass of an electron =9.11 X 10 -28 g) has a wavelength of:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
So, matter and light are composed of particles that have wave-like properties. The wave-like behavior is only 
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

qantum theory of matter - WaveParticle Duality of Matter...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online